Eliminar datos de una tabla de MySQL usando MySQLi y PDO
La sentencia DELETE se utiliza para eliminar registros de una tabla:
DELETE FROM table_name
WHERE some_column = some_value
Note la cláusula WHERE en la sintaxis BORRAR: La cláusula WHERE especifica el registro o registros que se deben eliminar. Si se omite la cláusula WHERE, todos los registros serán borrados!
Para obtener más información acerca de SQL, visite nuestro tutorial de SQL .
Veamos el "MyGuests" tabla:
| carné de identidad | nombre de pila | apellido | correo electrónico | reg_date |
|---|---|---|---|---|
| 1 | John | Gama | [email protected] | 10/22/2014 14:26:15 |
| 2 | María | Moe | [email protected] | 10/23/2014 10:22:30 |
| 3 | Julie | Dooley | [email protected] | 10/26/2014 10:48:23 |
Los siguientes ejemplos borrar el registro con id = 3 en el "MyGuests" tabla:
Ejemplo (MySQLi Object-oriented)
<?php
$servername = "localhost";
$username = "username";
$password =
"password";
$dbname =
"myDB";
// Create connection
$conn =
new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// sql to delete a record
$sql
= "DELETE FROM MyGuests WHERE id=3";
if ($conn->query($sql) === TRUE) {
echo "Record
deleted successfully";
} else {
echo
"Error deleting record: " . $conn->error;
}
$conn->close();
?>
Ejemplo (MySQLi Procedural)
<?php
$servername = "localhost";
$username = "username";
$password =
"password";
$dbname =
"myDB";
// Create connection
$conn = mysqli_connect($servername, $username, $password,
$dbname);
// Check connection
if (!$conn) {
die("Connection
failed: " . mysqli_connect_error());
}
// sql to delete a
record
$sql
= "DELETE FROM MyGuests WHERE id=3";
if (mysqli_query($conn, $sql)) {
echo "Record deleted
successfully";
} else {
echo "Error
deleting record: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
Ejemplo (PDO)
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname =
"myDBPDO";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname",
$username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE,
PDO::ERRMODE_EXCEPTION);
// sql to delete a record
$sql
= "DELETE FROM MyGuests WHERE id=3";
// use exec() because no
results are returned
$conn->exec($sql);
echo "Record deleted successfully";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>
Después se elimina el registro, la tabla se verá así:
| carné de identidad | nombre de pila | apellido | correo electrónico | reg_date |
|---|---|---|---|---|
| 1 | John | Gama | [email protected] | 10/22/2014 14:26:15 |
| 2 | María | Moe | [email protected] | 10/23/2014 10:22:30 |